Malicious PDF — malware analysis report

Static analysis result for SHA-256 352ca94def7560cf…

MALICIOUS

PDF

71.6 KB Created: 2021-09-19 03:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7532ff249eea3dbba9498e03b7d8a0a1 SHA-1: d7123398d374852a26c3df57b5797f0e9c4136cd SHA-256: 352ca94def7560cfca094dd988784eab2c496a1cd50a014121c9e2c9876755a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to numerous PDF files hosted on various domains, many of which appear to be compromised CMS uploads. The presence of multiple distinct hosts and the nature of the URLs suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://chapelguild.com/images/usr/98292128575.pdf In PDF document text
    • http://studioscoponi.eu/userfiles/files/57830639846.pdfIn PDF document text
    • http://dywin.com/uploadfile/files/wafubemumiwemibuditeni.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/10703273246.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/57955093211.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/xedowuxejuwipalabuw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e960eb8159---zakusixusodedodi.pdfIn PDF document text
    • http://lecostationery.com/files/file/41897250098.pdfIn PDF document text
    • http://holdemigny.fr/ckfinder/userfiles/files/32526632707.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/0960968ffb1131b3238531ded34ffe69/kajemoda.pdfIn PDF document text
    • http://airzo.net/userData/board/file/tisuxejejubegati.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/wunadadopabitasopaxu.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/gekojolisalogubiroge.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/zubexodelenanufun.pdfIn PDF document text
    • http://ccadl.com/files/20210910234625.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/1f09ae595374a6b8135c33e37caa8912/56203706838.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/vawapi.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/229ebb2401508a42e03ff4f510cfe667/41323231846.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/13538229506.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/29463608458.pdfIn PDF document text
    • https://www.aledrukujemy.pl/ckfinder/userfiles/files/bisojejexoriwupulu.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210917233014.pdfIn PDF document text
    • http://djpress.pl/Image/files/duxekokajexinobupepivo.pdfIn PDF document text
    • http://hueide.com/upload/files/91803127195.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/a913d1d112e4a0c77897b89e82f04552/jotozewefosewar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=side+by+side+book+4+third+edition+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A2 10888 bytes
SHA-256: b5742993dffc5c76be94751a612c6ce50fe913d2340d59296652a72f329124cb
font_01_sfnt_off0000d08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08B 15624 bytes
SHA-256: 5874f3591df0b22b455f12602d9c1ddeb81cb974e32b08fb1d6deea019f53ae4
font_02_sfnt_off0000f880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF880 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1